PLS HELP!explorer.exe infected?..!

New Member

Well.explorer.exe size has changed...But there has been windows 7 updates,etc.
Every winodws 7 update is up to date,etc.But i would replace it but i don't know if its changed from an update or infected,etc.Thanks,So would anyone know if this is the legit file?.Thank You
The size of my explorer.exe is 2.49 MB (2,616,320 bytes)